您可以说："My father works at the city pbrary."
来源：这是一句常用的英语句子。
一些英文例句和中文翻译：
He has been working at the city pbrary for five years. 他在市图书馆工作了五年。
My father is in charge of the reference section at the city pbrary. 我爸爸负责市图书馆的参考书区。
He loves working at the city pbrary because he gets to help people find the information they need. 他喜欢在市图书馆工作，因为他可以帮助人们找到他们需要的信息。